EP3252391B1 - Pistolet thermique sans balai comprenant un circuit de commande - Google Patents

Pistolet thermique sans balai comprenant un circuit de commande Download PDF

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Publication number
EP3252391B1
EP3252391B1 EP16187297.3A EP16187297A EP3252391B1 EP 3252391 B1 EP3252391 B1 EP 3252391B1 EP 16187297 A EP16187297 A EP 16187297A EP 3252391 B1 EP3252391 B1 EP 3252391B1
Authority
EP
European Patent Office
Prior art keywords
heat gun
brushless
module
circuit
gear switch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP16187297.3A
Other languages
German (de)
English (en)
Other versions
EP3252391A1 (fr
Inventor
Ting HAN
Weiming YANG
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Prulde Electric Appliance Co Ltd
Original Assignee
Zhejiang Prulde Electric Appliance Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Prulde Electric Appliance Co Ltd filed Critical Zhejiang Prulde Electric Appliance Co Ltd
Publication of EP3252391A1 publication Critical patent/EP3252391A1/fr
Application granted granted Critical
Publication of EP3252391B1 publication Critical patent/EP3252391B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0423—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between hand-held air guns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91431—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature the temperature being kept constant over time
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
    • B29C66/91641—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/96—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
    • B29C66/961—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving a feedback loop mechanism, e.g. comparison with a desired value
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/96—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
    • B29C66/967—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving special data inputs or special data outputs, e.g. for monitoring purposes
    • B29C66/9672—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving special data inputs or special data outputs, e.g. for monitoring purposes involving special data inputs, e.g. involving barcodes, RFID tags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/96—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
    • B29C66/967—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving special data inputs or special data outputs, e.g. for monitoring purposes
    • B29C66/9674—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving special data inputs or special data outputs, e.g. for monitoring purposes involving special data outputs, e.g. special data display means

Definitions

  • the invention relates to a heat gun, and particularly relates to a brushless heat gun provided with a control circuit.
  • a heat gun is a tool which mainly utilizes hot air blown from a gun core made from heating resistance wires to weld and pick components.
  • the main part of control circuit in the heat gun should comprise a temperature signal amplifying circuit, a comparison circuit, a silicon controlled circuit, a sensor, and an air control circuit, etc.
  • some auxiliary circuits such as a temperature display circuit, a power off time delay circuit, and a zero-crossing detection circuit are provided as well.
  • the temperature display circuit is provided for facilitating temperature regulation. The temperature displayed by the temperature display circuit is the actual temperature of the circuit, so that the workers may regulate the temperature manually n accordance with the temperature displayed on the display screen during the operation process.
  • the EMC (electro magnetic compatibility) of the existing heat gun is too low to pass the safety standard test.
  • the invention provides a brushless heat gun provided with a control circuit, which has better security performance.
  • a brushless heat gun provided with a control circuit, comprising: a fan module provided with a brushless motor and a heating module; and a main control unit controlling the rotation of the fan module and the heating of the heating module, characterized in that the brushless heat gun further comprises a gear switch unit which is used to supply power to the brushless heat gun, and an EMC processing circuit which used to enhance the electro magnetic compatibility of the brush heat gun is provided between the gear switch unit and an external power supply, the EMC processing circuit comprising a discharging circuit connected with the external power supply, a lightning protection circuit connected with the discharging circuit, a pre-capacitor connected with the lightning protection circuit, a common mode inductor connected with the pre-capacitor, and a post-capacitor, one end of which is connected with the common mode inductor and the other end of which is connected with the gear switch unit.
  • the first preferred solution of the invention is: the brushless heat gun further comprises a key module, which is connected with the main control unit and the gear switch unit for inputting user control information.
  • the second preferred solution of the invention is: the brushless heat gun further comprises a detecting module, which is connected with the main control unit and the gear switch unit for acquiring the working condition of the brushless heat gun.
  • the detecting module comprises at least one thermocouple temperature sensor disposed at the air outlet of a heating cylinder.
  • the fourth preferred solution of the invention is: the brushless heat gun further comprises a memory storage module connected with the main control unit and the gear switch unit for storing the working condition.
  • the fifth preferred solution of the invention is: the brushless heat gun further comprises a display module connected with the main control unit and the gear switch unit for displaying the working condition.
  • the sixth preferred solution of the invention is: the main control unit is connected with the heating module via a drive circuit.
  • the invention can achieve the following effects: a circuit with EMC processing capacity is provided so that the heat gun has better electro magnetic compatibility and higher security performance. The heat gun itself will not be significantly influenced even when the supply voltage changes.
  • a brushless heat gun provided with a control circuit comprises a fan module provided with a brushless motor and a heating module; and a main control unit controlling the rotation of the fan module and the heating of the heating module; and the brushless heat gun further comprises a gear switch unit supplying power to the brushless heat gun, and an EMC processing circuit which used to enhance the electro magnetic compatibility of the brush heat gun is provided between the gear switch unit and an external power supply.
  • the brushless heat gun further comprises a key module connected with the main control unit and the gear switch unit for inputting user control information.
  • the brushless heat gun further comprises a detecting module connected with the main control unit and the gear switch unit for acquiring the working conditions of the brushless heat gun.
  • the detecting module comprises at least one thermocouple temperature sensor provided at the air outlet of a heating cylinder.
  • the brushless heat gun further comprises a memory storage module connected with the main control unit and the gear switch unit for storing the working conditions.
  • the brushless heat gun further comprises a display module connected with the main control unit and the gear switch unit for displaying the working condition.
  • the EMC processing circuit comprises a discharging circuit connected with the external power supply, a lightning protection circuit connected with the discharging circuit, a pre-capacitor connected with the lightning protection circuit, a common mode inductor connected with the pre-capacitor, and a post-capacitor, one end of which is connected with the common mode inductor and the other end of which is connected with the gear switch unit.
  • the discharging circuit plays an effect of discharging, thereby preventing the control system of the heat gun being damaged by the large voltage
  • the lightning protection circuit is suitable for protecting the circuit in the case of excessive current.
  • the EMC processing circuit is used for protecting the input of the external power supply.
  • the external power supply is shunted via the gear switch unit, supplying power to various circuits within the heat gun, respectively.
  • the main control unit comprises a MCU and an external circuit thereof, controlling the work of the fan module and the heating module in accordance with the power information stored in the gear switch unit and the memory storage module.
  • the detecting module detects the working condition of the heating module.
  • the working condition comprises a heating condition, a cooling condition, a constant temperature condition, an overshoot condition, etc.
  • the main control unit coordinates the heating module and the fan module.
  • the display module comprises a display screen for displaying the heating condition, temperature information, etc.
  • the drive circuit of the brushless motor comprises a bridge drive circuit and a rectifier circuit connected with the bridge drive circuit.
  • the flicker-prevention funtion is achieved with the following steps based on the above modules.
  • the thermocouple temperature sensor acquires a temperature signal.
  • the MCU in the main control unit receives the above temperature signal.
  • the MCU receives data 10 times around the first cycle, and averages the data after removing the maximum value and the minimum value.
  • the voltage of the thermocouple is computed after performing the operation of the standard signal 1.2V within the MCU.
  • the first temperature is obtained by checking the standard reference table based on the voltage. In comparison with 700°C, if the obtained temperature is more than 700°C, the heating module is controlled to stop heating and the display module displays 888, while if the obtained temperature is less than 700°C, the display module displays the normal temperature.
  • the MCU performs PID operation by using the first temperature, the currently set temperature and the gradient of the gear temperature to work out the heating intensity pwm2_duty of the next cycle within the range of 0-200, wherein 0 refers to no heating and 200 refers to heating with full power.
  • the function of the proportion P in the PID operation to realize a rapid response process, that is to carry out one control intensity once an error is detected, but the control intensity cannot be too large, otherwise, it will increase the overshoot.
  • the function of I is to integral, aiming at eliminating the control error.
  • the control requires 600°C, but the actually tested temperature is only 598°C, then the deviation of 2°C will accumulate all the time, and the accumulating speed depends on the value of I, until the temperature reaches 600°C.
  • the function of D is to control the overshoot. Since the system has hysteresis, the fast heating speed will inevitably result in the overshoot of the temperature. The appropriate increase of D parameter can suppress the overshoot.
  • the selecting order of the three parameters is to tune PI first and tune D finally. And then, PI is finely tuned. MCU generates the heating intensity sequence according to the value of pwm2_duty.
  • the heating intensity pwm2_duty refers to the number of half-cycles to be heated in the 200 half-cycles accordingly. For example, when pwm2_duty is 100, it means that heating should last for 100 half-cycles and stop for 100 half-cycles within 2S time.
  • MCU controls the drive circuits to drive the heating module to work according to the above heating intensity sequence and to heat in synchronization with zero-crossing signals. However, it should be ensured that the next 2S can be processed after the control of the previous 2S has ended. If it does not ensure that the cycle of 2S, there is possibility that the waveform is frequently adjusted within 2S which will result in the increasing of the flicker PST value.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Coating Apparatus (AREA)
  • Control Of Temperature (AREA)

Claims (7)

  1. Pistolet thermique sans balais pourvu d'un circuit de commande, comprenant : un module de ventilateur pourvu d'un moteur sans balais et d'un module de chauffage ; et une unité de commande principale commandant la rotation du module de ventilation et le chauffage du module de chauffage, caractérisé en ce que le pistolet thermique sans balais comprend en outre une unité de commutation de vitesse alimentant le pistolet thermique sans balais, dans lequel un circuit de traitement CEM utilisé pour améliorer la compatibilité électromagnétique du pistolet thermique à balais est assurée entre l'unité de commutation de vitesse et une alimentation externe, le circuit de traitement CEM comprenant un circuit de décharge relié à l'alimentation externe, un circuit de protection contre la foudre relié au circuit de décharge, un pré-condensateur relié au circuit de protection contre la foudre, une bobine d'inductance de mode commun reliée au pré-condensateur et un post-condensateur, dont une extrémité est reliée à la bobine d'inductance de mode commun et dont l'autre extrémité est reliée à l'unité de commutation de vitesse.
  2. Pistolet thermique sans balais selon la revendication 1, caractérisé en ce que : le pistolet thermique sans balais comprend en outre un module de clé relié à l'unité de commande principale et à l'unité de commutation de vitesse pour entrer des informations de commande d'utilisateur.
  3. Pistolet thermique sans balais selon l'une des revendications précédentes, caractérisé en ce que : le pistolet thermique sans balais comprend en outre un module de détection relié à l'unité de commande principale et à l'unité de commutation de vitesse pour acquérir l'état de fonctionnement du pistolet thermique sans balais.
  4. Pistolet thermique sans balais selon la revendication 3, caractérisé en ce que : le module de détection comprend au moins un capteur de température à thermocouple prévu à la sortie d'air d'un cylindre chauffant.
  5. Pistolet thermique sans balais selon la revendication 3 ou 4, caractérisé en ce que : le pistolet thermique sans balais comprend en outre un module de stockage de mémoire relié à l'unité de commande principale et à l'unité de commutation de vitesse pour stocker l'état de fonctionnement.
  6. Pistolet thermique sans balais selon l'une des revendications 3 à 5, caractérisé en ce que : le pistolet thermique sans balais comprend en outre un module d'affichage relié à l'unité de commande principale et à l'unité de commutation de vitesse pour afficher l'état de fonctionnement.
  7. Pistolet thermique sans balais selon l'une des revendications précédentes, caractérisé en ce que : l'unité de commande principale est reliée au module de chauffage par le biais d'un circuit d'entraînement.
EP16187297.3A 2016-06-01 2016-09-05 Pistolet thermique sans balai comprenant un circuit de commande Active EP3252391B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620526586.XU CN206099752U (zh) 2016-06-01 2016-06-01 设有控制电路的无刷热风枪

Publications (2)

Publication Number Publication Date
EP3252391A1 EP3252391A1 (fr) 2017-12-06
EP3252391B1 true EP3252391B1 (fr) 2021-03-10

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EP16187297.3A Active EP3252391B1 (fr) 2016-06-01 2016-09-05 Pistolet thermique sans balai comprenant un circuit de commande

Country Status (2)

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EP (1) EP3252391B1 (fr)
CN (1) CN206099752U (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10242414A1 (de) * 2002-09-12 2004-03-25 Hilti Ag Elektrowerkzeugmaschine mit Gebläse
EP1577078B1 (fr) * 2004-03-15 2009-04-29 Wegener International GmbH Outil de soudage à main pour le soudage d'éléments en matière synthétique
US8373317B2 (en) * 2009-05-04 2013-02-12 Ingersoll Rand Company RFI suppression system and method of mounting for DC cordless tools
DE102011087117B4 (de) * 2011-11-25 2023-07-20 Hilti Aktiengesellschaft Elektrischer Antrieb für eine Handwerkzeugmaschine
DE202014100647U1 (de) * 2013-06-27 2014-09-30 Wegener International Gmbh Heißluftgerät

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CN206099752U (zh) 2017-04-12
EP3252391A1 (fr) 2017-12-06

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